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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">uzspbgmu</journal-id><journal-title-group><journal-title xml:lang="ru">Учёные записки Первого Санкт-Петербургского государственного медицинского университета имени академика И. П. Павлова</journal-title><trans-title-group xml:lang="en"><trans-title>The Scientific Notes of the Pavlov University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1607-4181</issn><issn pub-type="epub">2541-8807</issn><publisher><publisher-name>Academician I.P. Pavlov First St. Petersburg State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24884/1607-4181-2025-32-1-69-78</article-id><article-id custom-type="elpub" pub-id-type="custom">uzspbgmu-1102</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ РАБОТЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL PAPERS</subject></subj-group></article-categories><title-group><article-title>Биохимические показатели крови при использовании препаратов рыбьего жира в условиях интенсивной физической нагрузки</article-title><trans-title-group xml:lang="en"><trans-title>Biochemical blood counts in the application of fish oil preparations in conditions of intense physical activity</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-8753-4841</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Князева</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Knyazeva</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Князева Екатерина Александровна, магистр кафедры физиологии и анатомии Института биологии и биомедицины</p><p>603022, г. Нижний Новгород, пр. Гагарина, д. 23</p></bio><bio xml:lang="en"><p>Knyazeva Ekaterina A., Master of the Department of Physiology and Anatomy of the Institute of Biology and Biomedicine</p><p>23, Gagarin ave., Nizhny Novgorod, 603022</p></bio><email xlink:type="simple">EKnyazeva.kt@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8812-8559</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дерюгина</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Deryugina</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дерюгина Анна Вячеславовна, доктор биологических наук, доцент, зав. кафедрой физиологии и анатомии Института биологии и биомедицины</p><p>603022, г. Нижний Новгород, пр. Гагарина, д. 23</p></bio><bio xml:lang="en"><p>Deryugina Anna V., Dr. of Sci. (Biol.), Professor, Head of the Department of Physiology and Anatomy of the Institute of Biology and Biomedicine</p><p>23, Gagarin ave., Nizhny Novgorod, 603022</p></bio><email xlink:type="simple">derugina69@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-0443-9527</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ястребов</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Yastrebov</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ястребов Павел Викторович, младший научный сотрудник кафедры физиологии и анатомии Институт биологии и биомедицины</p><p>603022, г. Нижний Новгород, пр. Гагарина, д. 23</p></bio><bio xml:lang="en"><p>Yastrebov Pavel V., Junior Research Fellow of the Department of Physiology and Anatomy of the Institute of Biology and Biomedicine</p><p>23, Gagarin ave., Nizhny Novgorod, 603022</p></bio><email xlink:type="simple">kfg.unn@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7557-0564</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бояринов</surname><given-names>Г. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Boyarinov</surname><given-names>G. А.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бояринов Геннадий Андреевич, доктор медицинских наук, профессор, ведущий научный сотрудник кафедры физиологии и анатомии Института биологии и биомедицины; профессор кафедры анестезиологии, реаниматологии и трансфузиологии</p><p>603022, г. Нижний Новгород, пр. Гагарина, д. 23</p><p>603005, г. Нижний Новгород, пл. Минина и Пожарского, д. 10/1</p></bio><bio xml:lang="en"><p>Boyarinov Gennady A., Dr. of Sci. (Med.), Professor, Leading Research Fellow of the Department of Physiology and Anatomy of the Institute of Biology and Biomedicine; Professor of the Department of Anesthesiology, Reanimatology and Transfusiology</p><p>23, Gagarin ave., Nizhny Novgorod, 603022</p><p>10/1, Minin and Pozharsky sq., Nizhny Novgorod, 603005</p></bio><email xlink:type="simple">boyarin46@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Нижегородский государственный университет им. Н. И. Лобачевского</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lobachevsky State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский Нижегородский государственный университет им. Н. И. Лобачевского; Приволжский исследовательский медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lobachevsky State University; Privolzhsky Research Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>06</month><year>2025</year></pub-date><volume>32</volume><issue>1</issue><fpage>69</fpage><lpage>78</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Князева Е.А., Дерюгина А.В., Ястребов П.В., Бояринов Г.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Князева Е.А., Дерюгина А.В., Ястребов П.В., Бояринов Г.А.</copyright-holder><copyright-holder xml:lang="en">Knyazeva E.A., Deryugina A.V., Yastrebov P.V., Boyarinov G.А.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.sci-notes.ru/jour/article/view/1102">https://www.sci-notes.ru/jour/article/view/1102</self-uri><abstract><p>Цель – оценка влияния рыбьего жира и озонированного рыбьего жира на динамику биохимических показателей плазмы крови при моделировании физической нагрузки «до отказа» у крыс.Методы и материалы. Животные были разделены на 4 группы по 12 крыс. Контрольным животным перорально вводили физраствор (1 группа). Крыс (2 группа) кормили рыбьем жиром (доза 35 мг/кг) (РЖ), крыс 3 группы - озонированным рыбьем жиром (доза 35 мг/кг, озонидное число 3000) (ОРЖ 3000), 4 группа - озонированным рыбьем жиром (доза 35 мг/кг, озонидное число 1500) (ОРЖ 1500). Физическую нагрузку моделировали методом вынужденного плавания крыс «до отказа» с грузом 10% от массы тела. Забор крови проводили из подъязычной вены 6 раз: определяли исходный уровень показателей после нагрузочных тестов (4 раза) и после отмены препаратов (на 3 день). В пробах крови оценивали содержание глюкозы, лактата, мочевины, креатинина, АсТ, АлТ.Результаты. Физическая нагрузка вызывала снижение концентрации глюкозы во всех группах. Физическая активность в контрольной группе сопровождалась наиболее выраженным ростом лактата. Использование РЖ и ОРЖ нивелировало рост лактата по сравнению с контрольной группой. Концентрация мочевины снижалась в контрольной группе и принимающей РЖ и сохранялась на уровне исходных значений при действии ОРЖ 3000 и ОРЖ 1500, тогда как концентрация креатинина увеличивалась в контрольной группе и при действии ОРЖ 3000. Во всех группах регистрировалось увеличение АсТ и АлТ после физической активности на этапах после нагрузочных тестов, однако при использовании ОРЖ 1500 наблюдалось выраженное восстановление АсТ и АлТ после отмены препарата.Заключение. Пероральное введение ОРЖ 1500 при физических нагрузках значительной интенсивности в большей степени вызывало сохранность мышечной ткани и сокращение времени восстановления организма после чрезмерных физических нагрузок «до отказа».</p></abstract><trans-abstract xml:lang="en"><p>The objective was to evaluate the effect of fish oil and ozonated fish oil in the dynamics of biochemical parameters of blood plasma while modeling physical activity up to “to failure” in rats.Methods and materials. The animals were divided into 4 groups of 16 rats. Saline was administered orally to control animals (group 1). Rats (group 2) were fed fish oil (dose 35 mg/kg) (FO), rats of group 3 received ozonated fish oil (dose 35 mg/ kg, ozonide number 3000) (OFO 3000), group 4 – ozonated fish oil (dose 35 mg/ kg, ozonide number 1500) (OFO 1500). Physical activity was simulated by the method of forced swimming of rats «to failure» with a load of 10 % of body weight. Blood sampling was performed from the hyoid vein 6 times: the initial level of indicators was determined, after stress tests (4 times) and after drug withdrawal (on day 3). The blood samples were assessed for glucose, lactate, urea, creatinine, AST, ALT.Results. Physical activity caused a decrease in glucose concentration in all groups at the stages of loading tests with its subsequent recovery after drug withdrawal. The use of OFO 3000 showed exclusion because the index remained decreased after the drugs cancellation. Physical activity in the control group was accompanied by the most pronounced increase in lactate. The use of FO and OFO 1500 levelled the increase in lactate compared to the control group. The concentration of urea increased in the control group, with the action of FO, OFO 3000 and remained at the level of initial values with the use of OFO 1500. The concentration of creatinine increased in all groups, the least pronounced at the action of use of FO and OFO 1500. Creatinine concentration increased most strongly with OFO 3000 and did not recover after drug withdrawal. AST and ALT after physical activity increased at stages after exercise tests in all groups. However, with the use of FO and OFO 1500, a decrease in indices by the 4th exercise test and a pronounced recovery after drug cancellation were observed.Conclusion. Oral administration of OFO 1500 with physical exertion of significant intensity to a greater extent caused the preservation of muscle tissue and a reduction in the recovery time of the body after excessive physical exertion «to failure».</p></trans-abstract><kwd-group xml:lang="ru"><kwd>физическая нагрузка</kwd><kwd>рыбий жир</kwd><kwd>озонированный рыбий жир</kwd><kwd>креатинин</kwd><kwd>аспартатаминотрансфераза</kwd><kwd>аланинаминотрансфераза</kwd><kwd>лактат</kwd><kwd>глюкоза</kwd></kwd-group><kwd-group xml:lang="en"><kwd>physical activity</kwd><kwd>fish oil</kwd><kwd>ozonated fish oil</kwd><kwd>creatinine</kwd><kwd>aspartate transaminase</kwd><kwd>alanine transaminase</kwd><kwd>lactate</kwd><kwd>glucose</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Бутова О. А., Масалов С. В. 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